So what are you trying? And what device do you have? The instructions vary by device, instead of re-posting it here check out the instructions at the top of the stickfigures page and see if that helps.

First, open iTunes with your device attached and navigate to the “File Sharing” section of the “Apps” page, it looks like this. From there, find Stick Nodes in the list and save the project files that you want to your computer. Then go to Stick Nodes Pro in the list and add those exact files that you just saved.

You’re essentially taking the files from the Stick Nodes folder, putting them on your computer, then putting them in the Stick Nodes Pro folder.